Answer:
Nitrogen fixation by bacteria
hope it help
please mark as brainliest
the insurance company is obligated to pay $1,000 for this claim.
Social Darwinism is the term given to various theories of society which rise in the North America, Western Europe and United Kingdom during 1870s. The theories are applied to natural selection and survival of the fittest.
I really agree with your statement
Answer:
Lacks random assignment
Explanation:
the researcher may not Be able to establish valid causal relationships as the study lacks random assignment in that participants do not get equal opportunity of being assigned to groups. Random assignment means the researcher applies chance in assigning participants to groups such that the study is not biased and causal relationships are not affected. For example if a participant does not get to choose his group, the researcher randomly flips a coin to assign him to a group and so there is an uncorrupted result in findings